docs phrasing nit

flow_matching/path/path.py

@@ -55,7 +55,7 @@ def sample(self, x_0: Tensor, x_1: Tensor, t: Tensor) -> PathSample:
     def assert_sample_shape(self, x_0: Tensor, x_1: Tensor, t: Tensor):
         assert (
             t.ndim == 1
-        ), f"The time vector t must be one of shape [batch_size]. Got {t.shape}."
+        ), f"The time vector t must have shape [batch_size]. Got {t.shape}."
         assert (
             t.shape[0] == x_0.shape[0] == x_1.shape[0]
         ), f"Time t dimension must match the batch size [{x_1.shape[0]}]. Got {t.shape}"